chrome/browser/sync_file_system/drive_backend/conflict_resolver.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_
   6 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "chrome/browser/sync_file_system/sync_callbacks.h"
  14 #include "chrome/browser/sync_file_system/sync_task.h"
  15 #include "google_apis/drive/gdata_errorcode.h"
  16
  17 namespace drive {
  18 class DriveServiceInterface;
  19 }
  20
  21 namespace google_apis {
  22 class ResourceEntry;
  23 }
  24
  25 namespace sync_file_system {
  26 namespace drive_backend {
  27
  28 class MetadataDatabase;
  29 class SyncEngineContext;
  30 class TrackerSet;
  31
  32 // Resolves server side file confliction.
  33 // If a remote file has an active tracker and multiple managed parents,
  34 // ConflictResolver detaches the file from all parents other than the parent
  35 // of the active tracker.
  36 // If multiple trackers have the same local path or the same remote file,
  37 // ConflictResolver picks up one of them and delete others.
  38 class ConflictResolver : public SyncTask {
  39  public:
  40   typedef std::vector<std::string> FileIDList;
  41
  42   explicit ConflictResolver(SyncEngineContext* sync_context);
  43   virtual ~ConflictResolver();
  44   virtual void Run(const SyncStatusCallback& callback) OVERRIDE;
  45
  46  private:
  47   typedef std::pair<std::string, std::string> FileIDAndETag;
  48
  49   void DetachFromNonPrimaryParents(const SyncStatusCallback& callback);
  50   void DidDetachFromParent(const SyncStatusCallback& callback,
  51                            google_apis::GDataErrorCode error);
  52
  53   std::string PickPrimaryFile(const TrackerSet& trackers);
  54   void RemoveNonPrimaryFiles(const SyncStatusCallback& callback);
  55   void DidRemoveFile(const SyncStatusCallback& callback,
  56                      const std::string& file_id,
  57                      google_apis::GDataErrorCode error);
  58
  59   void UpdateFileMetadata(const std::string& file_id,
  60                           const SyncStatusCallback& callback);
  61   void DidGetRemoteMetadata(const std::string& file_id,
  62                             const SyncStatusCallback& callback,
  63                             google_apis::GDataErrorCode error,
  64                             scoped_ptr<google_apis::ResourceEntry> entry);
  65
  66   std::string target_file_id_;
  67   std::vector<std::string> parents_to_remove_;
  68
  69   std::vector<FileIDAndETag> non_primary_file_ids_;
  70   FileIDList deleted_file_ids_;
  71
  72   bool IsContextReady();
  73   drive::DriveServiceInterface* drive_service();
  74   MetadataDatabase* metadata_database();
  75
  76   SyncEngineContext* sync_context_;  // Not owned.
  77
  78   base::WeakPtrFactory<ConflictResolver> weak_ptr_factory_;
  79
  80   DISALLOW_COPY_AND_ASSIGN(ConflictResolver);
  81 };
  82
  83 }  // namespace drive_backend
  84 }  // namespace sync_file_system
  85
  86 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_